[{"data":1,"prerenderedAt":213},["ShallowReactive",2],{"project-25482856":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":20,"keywords":22,"reception":28,"sentiment":29,"stance_mix":30,"scored_comments":34,"aspects":35,"strip":41,"post_text":43,"what":44,"said":64,"maker_in_thread":126,"shape":133,"grid":137,"attempts":175,"same_week":176,"maker_shows":37,"maker_hidden":205,"reader_version":206,"card":207},"25482856","chimes","Mantel-top computerized musical chimes with MicroPython on an ESP-32","title","Show HN: Mantel-top computerized musical chimes with MicroPython on an ESP-32","https:\u002F\u002Fgithub.com\u002Fkeredson\u002Fchimes\u002Fblob\u002Fmain\u002FREADME.md","github.com","keredson",1608425623,2020,44,17,1150,3028,38,"shown","hardware","musical instrument",[23,24,25,26,27],"esp32","micropython","solenoid","musical chimes","electromagnet","mixed",0.178,{"positive":31,"neutral":31,"mixed":32,"critical":33},3,0,1,7,{"design":36,"idea":38,"pricing":39,"execution":40},{"positive":37,"critical":32},2,{"positive":33,"critical":32},{"positive":32,"critical":32},{"positive":32,"critical":33},[42,42,32,32,31,32,42,32,32,31,32,31,32,32,32,33,32],5,null,{"problem":43,"audience":43,"pricing":43,"motivation":43,"time_to_build":43,"stack":45,"openness":62,"stage":63,"team_size":63},[46,52,56],{"value":47,"source":48,"evidence":49},"MicroPython","maker",[50],{"id":51},"post",{"value":53,"source":48,"evidence":54},"ESP-32",[55],{"id":51},{"value":57,"source":48,"evidence":58},"OpenSCAD (striker hinge file)",[59],{"id":60,"by":11,"text":61},"25483930","Thank you! There's a little plastic hinge that goes on the end of the dowel \u002F slots into the hanger. I don't have a picture, but the file is here:…","open_source","unknown",{"praise":65,"objections":78,"requests":96,"questions":108,"alternatives":116},[66],{"value":67,"source":68,"evidence":69},"Looks and sounds beautiful","commenter",[70,74],{"id":71,"by":72,"text":73},"25484834","bigyikes","Looks and sounds beautiful! I've been fascinated by the concept of automated musical instruments ever since I saw the self-playing piano at the Valley Fair mall in San Jose. I…",{"id":75,"by":76,"text":77},"25483792","seryoiupfurds","Beautiful project! I love how it turned out and I'm impressed by the homemade solenoids. I don't quite understand how the strikers work. Is there something magnetic attached to…",[79,85,92],{"value":80,"source":48,"evidence":81},"Gravity return of strikers is not reliable",[82],{"id":83,"by":11,"text":84},"25484083","On the dowel there are 5 steel nuts which are pulled towards the electromagnet. Gravity makes them return, but TBH it's not reliable enough. I'm working on a new version with…",{"value":86,"source":68,"evidence":87},"Ninth note sounds off-pitch",[88],{"id":89,"by":90,"text":91},"25488025","coolgeek","Nice hack. Two tangential complaints. First, it sounds to me like the ninth note is off - it's lower than it should be. Second, that page ate a huge chunk of my monthly mobile…",{"value":93,"source":68,"evidence":94},"Page loads heavy media and used a lot of mobile data",[95],{"id":89,"by":90,"text":91},[97],{"value":98,"source":68,"evidence":99},"Use servos instead of electromagnets",[100,104],{"id":101,"by":102,"text":103},"25487572","jsjohnst","Did you consider using servos vs electromagnets? Curious if small servos couldn’t accomplish the same goal.",{"id":105,"by":106,"text":107},"25492214","daniellarusso","That is a good idea. Those 9g mini servos are only $2 each, so that is much more affordable than the ‘retail’ solenoids.",[109],{"value":110,"source":68,"evidence":111},"How do the strikers work",[112,113],{"id":75,"by":76,"text":77},{"id":114,"by":106,"text":115},"25484072","The electromagnets are used as a solenoid, it seems. So, the electromagnet ‘pulls’ the piece of steel into its inner cavity. The wooden stick and bead seems to be arranged and…",[117],{"value":118,"source":68,"evidence":119},"Commercial retail solenoids",[120,123],{"id":121,"by":106,"text":122},"25484142","Really impressive work! I am really interested in what you are able to come up with. I remember taking apart old telephones with bell ringing mechanisms. That might be a source…",{"id":124,"by":11,"text":125},"25484633","Hah, yeah, I think I saw them on Amazon for like $20. That seemed nuts; why I decided to roll my own.",{"comments":127,"answered":128,"key":129},6,4,[130,131,132],{"id":60,"text":61},{"id":83,"text":84},{"id":124,"text":125},{"commenters":34,"max_depth":134,"maker_replies":127,"first_comment_mins":135,"lifespan_hours":136},8,198,93,[138,140,141,145,147,149,151,153,155,158,159,162,164,166,168,170,172],[71,32,42,139,72,32],"project\u002Fpositive\u002Fdesign",[75,33,42,139,76,32],[142,33,32,143,144,32],"25483822","commenter\u002Fneutral\u002Fnone","handmodel",[60,33,32,146,11,33],"maker\u002Fneutral\u002Fdesign",[114,33,31,148,106,32],"project\u002Fneutral\u002Fdesign",[83,33,32,150,11,33],"project\u002Fmixed\u002Fexecution",[121,33,42,152,106,32],"project\u002Fpositive\u002Fidea",[124,33,32,154,11,33],"maker\u002Fneutral\u002Fpricing",[156,33,32,157,11,33],"25484689","other\u002Fneutral\u002Fpricing",[101,33,31,148,102,32],[160,33,32,161,11,33],"25487814","maker\u002Fneutral\u002Fexecution",[105,33,31,163,106,32],"project\u002Fneutral\u002Fpricing",[165,33,32,157,102,32],"25499377",[167,33,32,143,106,32],"25514519",[169,33,32,157,102,32],"25522507",[89,37,33,171,90,32],"project\u002Fcritical\u002Fexecution",[173,37,32,174,11,33],"25488360","maker\u002Fneutral\u002Fperformance",[],[177,182,187,191,196,201],{"id":178,"name":179,"points":180,"category":181},"25495393","NoteCalc",267,"productivity",{"id":183,"name":184,"points":185,"category":186},"25484133","Owncast",241,"infrastructure",{"id":188,"name":189,"points":190,"category":181},"25497737","Pop.com",239,{"id":192,"name":193,"points":194,"category":195},"25494988","brightpath",222,"consumer_social",{"id":197,"name":198,"points":199,"category":200},"25455659","Panelle",192,"creative",{"id":202,"name":203,"points":204,"category":195},"25461367","StumblingOn",138,false,"v2",{"id":208,"name":5,"line":6,"ai":205,"cat":20,"year":13,"points":14,"comments":15,"rec":28,"s":209,"top":18,"kw":210,"maker":11,"domain":10,"tier":19,"attempts":32,"strip":211,"url":9,"mix":212,"praise":67,"objection":80,"sub":21},25482856,0.18,[23,24,25,26,27],"55003050030300010",[31,31,32,33],1794036599778]